How to inspect liner wear in LGF electromagnetic flowmeters? PTFE liner inspection guide

Electromagnetic flowmeter liner wear inspection is crucial for maintaining the long-term performance of LGF series flowmeters. Proper liner inspection involves systematic evaluation of multiple components:

• Visual inspection: Examine the measuring tube interior for cracks, delamination, or visible wear patterns on the PTFE liner surface
• Electrode assessment: Check electrode-liner interface for proper sealing, corrosion signs, or mechanical damage
• Insulation resistance testing: Use 500V megohmmeter to measure resistance between electrodes and pipe flanges (normal >20MΩ)
• Signal stability monitoring: Track output signal consistency as irregular fluctuations may indicate liner deterioration

For applications involving abrasive media, conduct liner wear inspections every 6 months. Replace the liner when wear exceeds 50% of original thickness or when through-wall damage occurs. Regular inspection prevents measurement accuracy degradation and ensures reliable operation in demanding industrial applications.